Sunday, April 17, 2011

Roof styles

Articles about "roof styles"
Roof Styles - Picture Dictionary of Roof Styles and Types and Details
Learn about roof styles, types, and details in our Picture Dictionary of RoofStyles.
Roof Styles - Gambrel Roof Picture Dictionary of Roof Styles and ...
The Dutch Colonial Revival Amityville Horror house in Amityville, New York has a gambrel roof. Learn about roof styles, types, and details in our Picture ...
Roof Styles - Hip Roof - Picture Dictionary of Roof Styles and ...
A hip (or hipped) roof slopes down to the eaves on all four sides. Learn about roof styles, types, and details in our Picture Dictionary of Roof Styles.
Roof Styles - Jerkinhead Roof - Picture Dictionary of Roof Styles ...
The Harriet Beecher Stowe House in Hartford, Connecticut has a hipped gable, or jerkinhead. Learn about roof styles, types, and details in our Picture ...
Roof Styles - Butterfly Roof - Picture Dictionary of Roof Styles ...
Built by the Alexander Construction company in the mid-twentieth century, this Palm Springs home has a butterfly roof. Learn about roof styles, types, ...
Roof Styles - Mansard Roof - Picture Dictionary of Roof Styles and ...
The Second Empire style Eisenhower Executive Office Building in Washington DC has a high mansard roof. Learn about roof styles, types, and details in our ...
Roof Styles - Side Gable - Cape Cod Style Roof - Picture ...
The gable on this house faces the sides. This house also has two roof dormers. Learn about roof styles, types, and details in our Picture Dictionary of Roof ...
Architecture Glossary - What is a mansard roof
Mansart revived interest in this roofing style, which had been characteristic of French Renaissance architecture, and was used for portions of the Louvre. ...
The mansard roof and second empire architecture
Characteristic of the Second Empire style, the mansard roof has a long and interesting history. Facts and photos.
Hip Roof Victorian - What Style Is This Hip Roof Victorian - House ...
Built in 1890 in a small Alabama town, this home doesn't seem to fit any of the common Victorian styles. Explore our House Style Workshop for answers to ...

Product Types
Below is a list of definitions of roof product types. To Search the CRRC Rated Products Directory, click here.
  • Built-up Roofing (includes asphalt and coal tar pitch): Built-up Roofing (BUR) consists of built-up layers of coated asphalt and insulation applied on site and can be covered with a capsheet (or surfacing material). The “cool” products found of the CRRC directory in this category refer to the properties of the capsheet.

  • Foam Roof Systems: Foam systems can also be divided into the field-applied and factory-applied categories.  Field-applied foam systems are similar to field-applied coatings, as they are sprayed on in liquid form and harden as they set on top of the roof.  Factory-applied foam systems are formed into rigid panels and coated with a reflective coating.  The foam usually give the roof system additional insulation properties.

  • Metal: Metal roofing products can be shaped to look like shingles, or shakes, or to fit unique curvatures, in addition to a typical “standing seam” configuration.  They come in a variety of textures and colors, including some darker “cool” colors with special additives that allow these dark colors to achieve significantly greater reflectance than previous versions of the same product. 
  • Modified Bitumen: Modified bitumen is bitumen (asphalt or tar) modified with plastic and layered with reinforcing materials then topped with a surfacing material.  Like BURs, the radiative properties of modified bitumen (mod bit for short) are determined by the surfacing material. 
  • Other: This is where the CRRC places any product that does not fit anywhere else. For example, we have a roof surfacing system, a rubber membrane, stucco, roll roofing and a few others.
  • Roof Coatings:  Roof coatings can be divided into two categories: field-applied and factory-applied.  Field-applied coatings are applied directly onto the roof surface, either on a new roof assembly or over an existing roof surface (and can be applied over top of just about anything, so long as the right coating is selected). Factory-applied coatings are applied at the factory prior to distribution.  Examples of factory-applied coatings include coatings applied to metal and glazes that are applied to tiles.
  • Shingles, Slate, or Tile: All of these products types use the same concept, where pieces fit together to form a roof. Asphalt shingles are fairly common for residential roofing applications, probably because they are relatively inexpensive and simple to install. Slate and tile products also come in a wide variety of colors, shapes and textures, and, because of their heavy mass, they have thermal properties that may yield additional energy savings beyond their reflectance and emittance properties.
  • Single-Ply:  Single-ply roofing is a pre-fabricated sheet of rubber polymers. Single-ply roofing is laid down in a single layer over a low or steep-sloped roof. The single-ply membrane can be loose-laid and weighted down with ballast or pavers or firmly set on the roof and attached with mechanical fasteners or adhesives. There are two main types of single-ply materials:
  • Single-Ply-Thermoset (includes EPDM, Hypalon): Thermosets are materials that can not be hot-air welded because it changes their physical characteristics. Instead, tape or a contact cement to seal the seams.
  • Single-Ply–Thermoplastic (includes TPO, PVC, etc.): Single-Ply-Thermoplastic is a flexible sheet membrane which consists of compounded plastic polymers.  When heat is applied onto the surface, the single ply-thermoplastic seams are melded together making the material seamless and effective. Most thermoplastics are manufactured to include a reinforcement layer (usually polyester or fiberglass) for extra durability and strength.  There are various types of single-ply-thermoplastic such as PVC & TPO.  PVC (polyvinyl chloride) is a synthetic polymer prepared from vinyl chloride. It tends to be more expensive than TPO, but is well known for long-term performance and is naturally fire-retardant. TPO (thermoplastic polyolefin) is a blend of polymers that can contain flame-retardants or UV absorbers.
Product Types Currently not included in the CRRC Rating Program:
  • Ballasted Roofs: Ballasted roofs are roofing systems that include a waterproof material (like a single-ply membrane) weighed down with heavy materials, called a ballast. The ballast is typically some sort of stone or concrete paver.
  • Green Roofs: Green roofs (also known as garden roofs or vegetated roofs) use plants as roof covering. Though technically not highly reflective, green roofs do provide similar energy savings and urban heat island mitigation benefits as cool roofs. They also absorb water, reducing storm water runoff. Green roofs are distinct from cool roofs and are not rated by the CRRC. 

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